Submarine vessel



W. D. SISSON.

SUBNIAHINE VESSEL.

AILICATlON FILED JUNE 25. i918. RENEWED OCT. |3. 1919.

6 SHEETS-SHEET l.

W. D. SISSON.

SUBMARINE VESSEL. APPLlcAnoN FILED 1uNE 25.1918. RENEWED ocr. 13,1919.

1,321,562. Patented Nov. 1l, 1919.

j; l Q 57 w`. o. slssoN. SUBMARINE VESSEL.

APPLICATlON FILED JAUNE 25. |918- RENEWED OCT. 1.3.1919.

6 SHEETS-SHEET 3.

Patented Nov. 11, 1919.

W. D; SISSON.

SUBMARINE VESSEL. APPLlCATloN F1LED1uNE25.1918. RENEwED ocT. 13,1919.

W. D. SISSON.

SUBMARINE VESSEL.

APPLICATION FILED JUNE 25. 19'18- RENEWED OCT. I3. 1919.

W. D. SISSON.

SUBMARINE VESSEL.

APPLICATKON FILED JUNE 25.1918. RENEWED OCT. 13,1919.

sirnTns PATENT ormoni.

'lllJLLAIVI DAVID SISSN, 0F NEW YORK, N. Y., ASSIGN?, TU THE AMERICANSALVAGE ooiirrmvr, INC., or weer New JERSEY.

NEWT JERSEY, A CGB/PORTION Oli NEW SUBMARINE VESSEL.

Application :filed June 25, 1913, Serial No. 241,767. Renewed October13, 1919.

ing to vbe a. full, clear, and exact description of the invention, suchas will enable others skilled in the art to which it appertains to inare and use the same.

rlhe present invention relates to improve.

ments in subn'iarine vessels, particularly adapted for salvage Work onsunken ships.

ln my prior Patent No. 1,134,963, dated rrpril (i, 1915, l have shoivn avessel of this type in which there is a hollow shell adapted to carrythe operators of the vessel and be submerged alongside of the hull of asunken vessel to the sides of Which the salvage vessel may bemagnetically attached by means of magnets niovably mounted upon the'eX-terior of the shell and controlled from the interior thereof so thatafter the magnets have been attached to the hull of a sunken vessel, thesalvage vessel may be moved with respect to the sunken vessel as may bedesired, The salvage vessel is also provided with a drill by means of`which a hole n'aay be bored in the side of the sunken vessel and intothis hole may be inserted a hook to v-.fhich a. chain leadingto alifting` pontoon or other devicemay be attached. In order to permit thehook to be manipulated from the interior of the shell, a magnetic memberextending through the wall of the shell and to the outer end of whichthe hook may be attached is provided.` lt is intended that the salvagevessel shall be lowered from suit able supporting devices, but it isprovided with a. propeller and a rudder by means of which it may benavigated through the Water after 1t has been submerged to enable it tobe brought into the desired position adjathe shell to be easily broughtto the sniff'ace,`

in ease of accident to the hoisting' apparatus or' any otheremei'sueies.

The shell of the sa :age vessel 1s also pro' Specification of LettersEatent.

s; and l do hereby declare the follovv-v `Fatel'ited Nov. 11, 1919.

sei-iai No. 330,321.

vided with suitable view ports and means for illuminating the areasur'rounding` the shell so that the progress of the salvage Workmay beobserved.

lt is a general object of the present invention to improve the mechanismof a salvaging` vessel of this type so that it may be operated withgreater reliability and accuracy when submerged and also with increasedsafety for its occupants. To attain'V this lgeneral object as Well `asother objects Which Will appear more clearly hereinafter, thel pres ont'invention comprises a vessel of such buoyancy that it will normallyiioat in Water and the shell of the vessel is provided with an openingthrough which entrance and eXit may be obtained and this opening isprovidedv with a cover having suitable clamps and an automaticarrangement for lifting; the cover when the clamps are released so thatin case of emergency the cover may be quickly opened. The shell of thevessel isalso provided with suitable port holes and lights upon itsexterior for illuminating the surroundings. It is intended that thevessel shall be suspended from suitable hoisting apparatus, but sinceits buoyancy Will cause it to float in Water, propellers are providedfor submergingr the vessel. ln or der that the vesselmay be navigatedwhen submerged, other propellers and a rudder are provided, and all ofthe propellers are driven by a motor Within the vessel and may besuitably controlled.

The present invention also comprises an in-iproved arrangement formountingv the attachino` magnets upon the vessel. In accordance with thepresent invention, each mag; net is attached to a carriage which iscarried by a pair of screws rotatably mounted upon theexterior of thevessel and adaptedform of hook for attaching the liftingpontoons to theside of a vessel that is to be raised.

Other features `of the. present invention y and improvements over priordevices of this character will appear more clearly from a description ofa preferred embodiment of the invention asshown in the accompanyingdrawings Vin which Figure 1 is an elevation of the exterior of thevessel; Fig. 2 shows Y the exterior ofthe vessel viewed from the left ofFig. 1; Fig. 3 is aview in section -walong .the line 3-3'of Fig.2.showing the i mechanism within the vessel; Fig. 4 is a plan view ofthe bottornof the interior of the Vvessel, thefsection through the shellbeing taken at approximately the midpoint thereofpFig. 5 is a plan Viewof the mecha- *nism mounted within theshell on a somewhat lower sectionplane than Fig. 4; Fig. 6 is a detailed view in section along the liney6-6 of F ig. 5; Fig. 7 is asectional elevation ofthe bottomV portion ofthe shell along the lines7-7 of Fig. 4; Fig. 8 is a plan View showingthe salvage vessel held in position against` the side of a submergedvessel; Fig. 9 is a `plan view partly in section of the hook insertingdevice with a hook held Y' line 1010 of Fig. 9;

thereon in position to'be inserted in holes in the side of a. submergedvessel; Fig. 10 is an elevation partly in section along the Fig. 11shows the positionoccupied by the hook after it has A been insertedinthe aperture in the side of 35V hook.

thevessel and Fig. 12 is an end view 0f the Referring to the drawings inwhich similar reference characters denote similar parts throughout theseveral views', the shell of vunderstood that in practice suitablegaskets will'be provided to insure water-tight oints. Uponthev'exterior'of the shell aire formed y lugs 24 for attaching suitablelifting chains i or cables, which have not however, been Y shown inthedrawings.

suitable vi ew Attached to the exterior' of the bottom section 20 is aframe* work constituting a. standard for supporting the vessel whenfitis not suspended Y or-i'nKVV use. The bottom section is also pro Yvided'iwith suitable brackets and supports for other parts of theapparatus as will hereinafter-appear; I

The middle section 22 isprovided with port-'holes 26 and 27. Alsomounted upon this` section of the shell are brackets 28 for supportinglights fOl.' l111mnating the surroundings, these lights heiligpreferably protected by cages 29.

The top section 21 of the shell is provided with port holesk 30 havingglass windows, and an aperture serving as a passageway into and out ofthe shell. This aperture is pi'ovided with a cover 31 hinged at 32 andprovided on its interior with clamps comprising depending links adaptedt0 fit with in slots in the outer ends of lugs 34 projecting from theinner wall of the passageway. Operating handles 35 are attached to thelower ends of the links and engage the under surfaces of the lugs 34 bya cam action to enable the cover to be tightly clamped in place. Asuitable gasket 36 for forming a water tight'joint should be provided.In order that the cover may be automatically lifted when the clamps arereleased, itis provided with an upwardly extending portion 37 adjacentthe hinge 32 and to tie upper end of which is attached one end of aspring 38, the other end of which is attached to a. bracket 39 fastenedto the outside of the shell. By virtue of this arrangement, it is onlynecessary for the operator to disengage the clamps, after which thecover will be pulled open by the spring so that he will not havel tolift the same. The upper section is also provided with a water tightgland 40 through which passes an electric cable 41 containing theconductors for supplying current to the apparatus within the shell.

Mounted upon a suitable .frame-work 45 within the bottom section of theshell is a motor 46, the speed and direction of rotation of which may becontrolled by a suitable controller 47 provided with an operating handle4S, the cable 41 being connected to the controller through suitablefuses and main switches as may be desired. The diiv ing pulley 49 of themotor which should preferably be in the form of a sprocket wheel, isconnected by means of a sprocket chain 50 to asprocket wheel' 51 on ashaft 52 supported in bearings 53 attached to the frame-work in thebottom section of the shell. A sprocket 54 is loosely mounted near oneend of shaft 52 and is adapted to be rotatably connected to this shaftby means of a clutch 55 having an operating handle 56 extending intoposition to be conveniently manipulated by the operator of the vessel.Sprocket wheel 54 is connected by sprocket chain 57 to a sprocket wheel58 on a shaft 59 supported in suitable bearings 60 projecting inwardlyfrom the wall of the shell. Loosely mounted upon shaft 59 are pinions 61and 62, each of which may be connected to rotate with the shaft byclutches 63 and 64 respectively, and these clutches are controlled bycorresponding operating levers 65 and 66. Pinions 61 and 62 mesh withpinions 67 and 68 respectively, and as shown most clearly a pinion 86upon shaft 59.

in Fig. 3, each oi the last named pinioiis is attached to a shaftextendingthrough the wall of the shell. The shaft 69 which carries thepinion 67 has at its outer end a propeller 70, while the shaft 71 whichcarriespinion 68 has at its outer end a propeller 7 1t will beunderstood that the shafts 69 and 71 are carried through the walls ofthe shell in suitable bearings 73 provided with watertight packing. Thepropeilers and 72 are for the purpose of navigating the vessel in ahorizontal plane, but in order to steer the vessel a rudder 71 provided.This rudder is attached to a post 75 extending through a suitablewater-tight bearing in the wall of the shell and carrying at its innerend a gear 70 which meshes with a gear 77 on the end of a rod 78provided with a steering` wheel 7 9 in position to be convenientlyreached by the oihierator of the vessel.

As described above, the propellers 7 0 and 2 are adapted to be drivenfrom the main shatt- 52 through the sprocket chain 57 under he controlot clutch 55, but there is also pro-vided another ,driving connectionbetween this main shaft and the propellers so that they may be drivenvat a different speed than that produced by the sprocket chain 57. Thisalternative driving connection coinprises a pinion 80 mounted on shaft52 at the end opposite to that at which the sprocket wheel is mounted.Pinion 80 meshes with a pinion. l81 loosely mounted upon the end of theshaft 82 and adaptedtobe rotatably connected to the shaft byaa clutch 83having an operating handle 841. *Attached to the other end of shaft 82is a pinion 85 meshing with There is thus foi-ined a driving connectionbetween ina-in shaft 52 and the shai't 59 which may be used instead otthe driving connection formed by the sprocket 4chain 57, it beingundestood that either one ot these driving connections may be used asdesired, and that in addition to the variations in speed of thepropellers produced by these two driving connections, the speed` of themotor may be governed by its controller, so that the speed of thepropel- 1ers may be controlled to a degree sufficient iler practicalpurposes. the tact that the operating connections of the nropellcrs tethe shaft 59 are under the control of separate clutches 63 and 64,either or both of the propellers may be operated., so that the vesselmay be steered by the propel- 1ers. ii ne essary.

Attached to one end of the main shaft 52 is a sprocket wheel which isconnected by a sprocket chain 91 to a sprocket wheel 92 on a shaft 93mounted .in suitable bearingsv 94.k lli-oosely mounted on shaft 93 is agear 95 adapted to be rotatably connected to the shalt by clutch 9GAhaving any operating handle cfiear meshes with a gear 98 on one end ofa shaft 991 There is also Also by virtue oi2V mounted upon this shatt asomewhat larger gear 100 which meshes with a gear 101 loosely mountedupon shaft 93 and adapted to be connected to this shaft by a clutch 102provided witli an operating handle 103. 0n account of the difference ingear ratio, between the pairs of gears 95, 98 and 100, 101, the shaft 99may be driven from the sha't't 93 at two different speeds, and bycontrolling the speed of the motor, the shaft 93 may be driven atdillferent speeds, so that in prac tice the speed of the shaft 99 may bevaried within limits as desired. Upon the shaft 99 are pinioiis 1011 and105 which engage gears 106 and 107 respectively, on the ends of verticalsha'ft-s 108 and 109 respectively, which lpass through suitablewater-tight liiearings in the bottom of the shell and carry at theirlower ends piopellers 110 and 111. These propellers are for subinergiiigthe vessel, an d in order to prevent rotation of the entire vessel abouta vertical central axis, the pro-A The free end ofshaft 93 is providedwith a pinion 112 engaging a pinion 113 on a shaft 114 to which isattached a sprocket wheel 115 connected by a sprocket chain 116 with asprocket wheel 117 loosely mounted upon a sha1-t 118 but adapted to beconnected to the latter by a clutch 119 controlled by an operatinghandle 120. rlhe shaft 118 eX- tends through a suitable water-tightbearin 121 in the wall of the shell and carries at its outer end apinion 122 meshing with a pinion 123 upon a 'horizontal shaft 124mounted in suitable bearings on the exterior of the shell. Upon shaft124- are four pinions 125, each oi which engages a pinion 126 on the endof a vertical screw 127 rotatably mounted in suitable bearings formed atthe outer ends of brackets 128 projecting` from the exterior of theshell. As appears most clearly in Fig. 2, these vertical screws arearranged in pairs and upon each pair is side of a sunken vessel, therewill be a certain amount of ileXibility between them and the shell ofthe salvaging vessel. Since any suitable form ot swivel connection maybe used for the magnets., the saine has not beenV shown in detailherein.

In' addition to the pairs of vertical screws there are airs ofhorizontal screws 135 reach mounted upon the exterior of the casing, i

1 supported inrsuitable bearings at theouter ends of brackets 136projecting from the ex- Y terior of the shell. .Y Upon each pair ofhorizontal screws is a carriage and a magnet in all` respects Vlike themagnets 131 mounted VVupon the vertical screws, it Vbeing underzontal'screws 135, there isassociated with each of these screws, a pinion 137,each of Y which meshes'with a pinion 138 on a vertical shaft 139 whichcarries Vnear one end a pinion 140 meshing with a pinion 141 on the endof a shaft 142 extending into the shell throughY a vsuitable water-tightbearing 143 in the wall thereof. Within the i shell, the shaft 142carriesa sprocket wheel 144 connected bya sprocket chain 145 with zasprocket wheel 146 loosely' mounted on theshaft118 and adapted to beoperatively connected to the sprocket wheel 116 by a `shifting of .theclutch handle 120 in a direc- :tion opposite to that which as previouslydescribed is necessary to connect the sprocket wheel 116 in operativerelation to the shaft'118 through clutch 119. There is` thus provided asimplel construction by Vmovement of the corresponding magnets whicheither of the shafts 118 or 142 may Vbe operatively connected to theshaft 114 which is driven from the motor, and furthermore, thearrangement is such that both ofthe shaft 118 and 142 cannot at the sametime be connected to the shaft 114 thus preventing any possibility ofsimultaneous operation of the horizontal and vertical screws whichwouldY result in injury to the apparatus in case all of the magnets wereenergized' and in engagement with a` submerged surface. c Y

VIn order that the operator within the shell may be advised of theextent of movement imparted to the magnets on the Iexteriory of theVshell, there isprovided on the end of eachof shafts 118 and 142 atravelingV pointer 147, each of which is adapted to be moved back and'forth along a scale 148 by a screw on the endk of the correspondingshaft, the extent of movement'of theindex yalong the scale Vbeingproportional tov the with respect to the shell. f. l

` For the purpose of vboring holes in the sides of a 'sunken vessel forattachment of a hook, there is provided a drill 156 on the end of ashaft 151 which passes through a sleeve 152 slidably mounted ina-water-tight bearing 153 inzthe wall of the shell.`

Splinedupon the inner end of the shaft 151 is af gear 154A mounted'between stops- 155 holes in a submerged surface.

which also serve as bearings fr the inner end of shaft 151. Gear 154meshes with a gear 156 loosely mounted upon the main shaft 93 to whichit is adapted to be con nected by a clutch 157 controlled by anoperating handle 158. For the purpose of feeding the drill through theside of a sunken vessel, the sleeve 152 is provided Within the shellwith a cross piece 159 through the ends. of which are threaded screws160 rotatably supported in suitable bearings and carrying at their outerends pinions 161 which mesh with worms 162 on a shaft 162 lto one end ofwhich is attached a gear 163 meshing with a gear 164 on one end of ashaft 165, to the other end of which is attached a pinion 166 engaging aworm 167 loosely mounted on a shaft 93 but adapted to be rotatablyconnected to this shaft by a clutch 168 controlled by an operatinghandle 169. A pulley 170 is loosely mounted upon the other end of shaft162 but may be connected to rotate with this shaft by a clutch 171provided with an operating handle 172. Pulley 170 is connected by a beltto a small motor 173.

The arrangement for holding and inserting a hook within holes drilled inthe side of' a sunken vessel comprises a shaft 180 extending through awater-tight bearing 181.in the wall of the shell and supported at itsinner end in a bracket 182. The inner end of shaft 180 is screw-threadedto receive a gear 183 which meshes with a pinion 184 loosely mounted onshaft 93 but which may be connected to rotate with this shaft by aclutch 185 controlled by an operating handle186. In order that rotationof gear 183 may produce longitudinal movement of shaft 180, this gear isattached to the bracket 182 by means of pins 187 fitting in a groove inthe hub of the gear as shown most clearly in Fig. 6. The arrangementdescribed above will provide for longi* tudinal movement of the shaft180, but since it may be necessary when inserting a hook in the holeswhichk have been bored in the side of a sunken vessel that the shaft 180be given a rotary movement, a hand lever 190 is splined upon the shaft180 between the arms of a bracket 191 as shown most clearly in Fig. 6.'The lever 190 is provided with a locking` device 192 adapted to beinserted into teeth cut on a retaining member 193. Attached to the outerend of shaft 180 is a magnetic member for holding the hook preparatoryto inserting it in This magnetic member comprises a base portion 195screwed upon the end of shaft 180 and pro- Yvided with washers to form.a tight joint.

Attached to each end of the base 195 is an electro-magnet comprising anouter shell 196, the coil 197 and a core 198, the latter Vbeing formedwith a shoulder'199 near its inner end adapted to engage the end of theouter shell 196, and a smaller portion which extends through the end ofthe shell and receives a bolt 200 for fastening the magnet to the basemember 195. A washer 201 is provided for making a tight joint. Themagnet conductors 202 are carried through an aperture inthe end of thecasing 196 and then through a bore in the base member 195 and finallythrough a bore in the shaft 180 by which they are led into the interiorof the shell to suitable controlling switches. By the provision of thewashers as described, there will be no leakage of water into the shellthrough the magnetic head and the bore in shaft 180. The outer face ofeach of the magnets is formed with a conical depression as at 203adapted to receive a correspondingly shaped end of a portion of thehook.

The hook userfor attaching a pontoon to the side of a sunken vesselcomprises a yoke 205 having the shape shown most clearly in Fig. 12, andto the cei'rtral portion of which a chain 206 may be connected. rl`heenlarged ends of the yoke arc each provided with an aperture as at 207within each of which is mounted a shank 20S of the hook. Each of theshanks is provided with a pointed outer end 209 and an enlarged pointedinner end 210 adapted to it .vithin the conical depression 203 in theface of the magnet. Along the sides of each shank are a number of Slots211, the outer ends of which are under-cut as at 212 to serve as socketsfor retaining the ends of latching members 213 placed within the slotsand adapted to be forced outwardly by springs 214. It is intended thatthe shanks shall be so related to the yoke 200 that the latter willnormally hold the latching members in place within the slots as shownmost clearly in Fig. 10, and in order to prevent the yoke from droppingoff of the shanks, the apertures in the yoke may be provided withinclined depressions forming shoulders as at 215, which shoulders engagethe outer corners of the latches when the hook is in its normalcondition. The latches 213 should preferably be formed with a squaredportion as at 216 so that after the shank has been pushed into the hole,the latches will be forced outwardly into the position shown in Fig. 11.

While the occupants of the vessel may be .supplied with air through ahose leading to a pump on a tender ship at the surface, prefer toprovide the shell with means for furnishing fresh air to the occupants,so that the `air supplied is independent of any surface connections. Forthis purpose, reservoirs of compressed air or any other well knownmethod of providing oxygen for the occupants of the shell may be used.In order to exhaust the foul air, there is provided a compressor 220driven by a motor 221 and having its intake within the shell and itsoutle-t communicating with a port in the wall of the shell. A reliefvalve 222 controlling a discharge pipe within the shell is provided inorder to permit the compressor to be started in case difficulty shouldbe experienced in overcoming the external pressure. The vessel will alsobe provided in practice with suitable gages for indicating the depth towhich it is submerged, as well as gages and other instruments forindicating the pressure and condition of the air within the vessel toavoid any danger to the occupants. The vessel should also be providedwith suitable signaling devices and telephones by which communicationmay be held with the tender ship.

W hen the vessel is to be used for salvaging work the operators enterthe saine and clamp the cover in place. The vessel is then lowered intothe water in the vicinity of the wrecked vessel and the submergingpropellers are connected to the driving motor 46 by manipulating eitherone of the clutch handles 97 or 103 according to the speed at which itis desired the propellers shall be rotated, and as has been explainedabove, the motor may be governed by the controller 117 to produce othervariations of speed. The propellers will draw the vessel downwardthrough the water, and since they rotate in opposite directions theywill not produce any turning effect upon the shell. While it is intendedthat the vessel shall be connected to suitable hoisting apparatus on thetender ship, it may be navigated after it has been submerged by thesubmerging propellers as well as by the propellers 7 0 and 72 and therudder 74. As has been explained above, the driving shaft 59 for thelast named propellers maybe driven at either one of two speeds bymanipulating either the clutch handle 50 or clutch handle 84rto connectthe driving connections controlled thereby to the driving shaft for thepropellers. Either or both of the propellers may be operativelyconnected to this driving shaft by manipulation of clutch handles 65 and(3G, so that the propellers and 72 may be used for steering the vessel,as well as for causing horizontal travel of the same.

The salvaging vessel may thus be navigated until the sunken vessel islocated, and it may then be further navigated along` the side of thesunken vessel until a point is reached at which a hook should be appliedfor attaching a pontoon or lifting cable. The lifting pontoons may be ofany desired construction and have not been shown in the present case.The method described in my prior Patent #1,134,963 may be used forcarrying the pontoon to its desired location and the hooks may besuspended from buoys on the surface so that they will be approximatelyat the points at which theyshould 30 171 ymaybe connected to drive thescrews V16,()1in a. reverse direction at rapid rateto l be applied tothe sunken vessel, but it will be understood that instead of theprocedure outlined .in my prior patentk any other ymethod of` bringingthe pontoons and hooks into their proper location may be used.

`llien the salvaging vessel is adjacent the Yhullof the sunken vessel atthe point where a" hook should be applied, it may be madneticallyattachedto the sunken. vessel by energizing the magnets y131. During theoperation of drilling a hole inthe side of the vessel, all'of themagnets should preferably be energized so that the thrust of the drill-will not by its reaction .produce any appreciable movement of thesalva'glng vessel.

The drill is put into operation by manipulation of clutch handle 158which controls the gears 154c and 156 for producing rotatlon ofthedrilland the clutch handle 169 which controls the gears 166, 167, shaft165, gears 164 'andr163 which drive the screws 160 to advance the sleeve152 throughthe wall of .the shell. The drill is thus rotated and fedthroughthe side of the sunken vessel until a hole has been bor-edthrough the same. Since the ,advance of thedrill is comparatively slow,means have been provided for Y producing a quick withdrawal of thedrill,

and this means consists of the motor 173 which through kthe Ypulley 17 0and clutch "cause the withdrawallof Vthe drill from. the

holein the side of the vessel, it being understood of course, that .the`gears forrotating andadvancing the drill are at this time disconnectedfrom the @nain driving shaft 93.

v Since/the attaching hook comprises two shanks,` itwill be necessaryitodrill two holes closely adjacent each other. rvIt is preferred thatthese two Aholes shall be placed horizonT tally, although they may beplaced -verti Acally or at any other angle, if desired. If

theya're to be placed horizontally, the two 'magnets 131 carriednponthepairs of vein tical screvvsl are denergized, but the mag- 1 nets carriedupon the horizontal'pairs of screws are energized and therefore holdagainst the side of the sunken vessel. By suitable manipulation of theVclutch handle 120,the 'shaft 142 may be operatively connecte'd to theshaft 11st through the'sprocket chains '116s andlfl-. ARotation oftheshaft 112 will through pinions 1&1 and 140 rotate the shaft 139 andtherebyrotate all of the horizontalI screws. vSince the magnets aresalvagingvessel witlifrespect to the side of scale la7-:148 within theshell, the amount est of.movementfnecessary to bring the drill in positin forV the; second .hole may jbe gaccu' rately determined. When thesalvaging vessel has been moved the proper amount, the rotation of thehorizontal screws is stopped and the magnets on the vertical screws areagain energized to clamp the salvaging vessel securely to the side ofthe sunken vessel. The drill is then operated to bore a second hole,after which the drill is withdrawn, the magnets on the vertical screwsagain denergized and the horizontal screws rotated to cause thesalvaging vessel to be moved into such a position that the hookinserting device registers with the holes drilled in the side of thesunken vessel. If at any time the movement .desired to be imparted tothe salvaging vessel with respect to the sunken vessel is more than canbe taken care of by the length of the horizontal screws, the magnets onthese screws may be denergized and the salvaging vessel heldin placeagainst the `side of the slinken vessel by the magnets on the verticalscrews, while the magnets on the horizontal screws are being movedtoward one end of the horizontal screws, so that upon .subsequentattaclnnent to the side of the Asunken vessel, the necessary horizontalmovement of the salvaging vessel may take place. If the hook is held insubmerged posit1on,-it may be necessary to move the salraging vesseluntil the hook can be located and seized by the magnets on the end ofshaft 180. After the hook has been seized by these magnets, thesalvaging vessel may he moved by suitable manipulation of the horizontaland vertical screws to bring the hookinto position to be applied tothelside of` the sunken vessel. For this purpose, the clutch handle 186is manipulated to operatively connect gears 18.3 and 18st to the maindriving shaft 93, and if necessary, the lever 190 may be moved to swingthe two Shanks of the hook into exact alinement with the holes in theside of the sunken vessel. The outward movement of shaft 180 will thrustthe Shanks of the hook through the holes in the side of the sunkenvessel until finally they reach a position such as shown in Fig. 11,where the latches 213 will be forced outward to engage the inside of theplates of the vessel, after which the hook holding magnets may bedcnergized and the rod 180 retracted by reversing the driving motor tocause the shaft 93 to rotate in the opposite direction.

In Fig. 8, I have shown somewhat diagrammatically in solid lines theposition occupied by the salvaging vessel with respect to a submergedsurface when the hole is being bored, and in broken lines, there hasbeen shown the position occupied bv`the salvaging vessel and the hookretaining magnets when the hook is to be inserted in the holes in theside of the sunken vessel. In this case, the movement of the salvagingvessel from the position shown in full lines to thatshown in brokenlines has been produced by rotation of the horizontal screws 135, itbeing understood that the magnets .arried upon these horizontal screwsare energized, and thus lirmly held against the side or' the sunkenvessel.

r1`he light furnished from the lamps on the outside of the she-ll of thesalvaging vessel will sufficiently illuminate the surroundings so thatthe work may be observed through the observation windows .in the sidesof the shell. lvhenever it is desired that the salvaging vessel bebrought to the surface, rotation of the submerging propellers may bestopped so that the natural buoyancy or' the vessel will carry it to thesurface of the water, and when it reaches the surface it is onlynecessary for the occupants to release the clamps holding the cover 31in place when the spring 38 will automatically lift the cover. While thesalvaging vessel is principally intended for use in attaching liftingdevices to the sides ot sunken vessels, it may also be used for any kindof submarine work and since it is built to withstand high waterpressures, it may be used for taking observations or performing othersalvaging work at depths beyond that to which divers can safely descend.lt will also be understood that various changes in the details oitconstruction of the apparatus may be made without departing trom theprinciples of the invention.

I claim:

1. 1n a submarine vessel, the combination of screws rotatably mountedupon the exterior of the vessel and magnets carried upon said screws andadapted to be moved with respect to the vessel by rotation of saidscrews.

2. 1n a submarine vessel, the combination ol' a plurality of pairs ofscrews rotatably mounted upon the exterior of the vessel, a plurality ofmagnets each carried on each pair of screws, and means for rotating thescrews of each pair in unison to move the magnet mounted thereon withrespect to the vessel.

3. 1n a submarine vessel, the combination of a plurality of pairs ofscrews rotatably mounted upon the exterior of the vessel, means fordriving` the screws or' each pair in unison, an electromagnet carriedupon each pair of screws, and means for rotating the screws of each pairin unison to move the magnet mounted thereon wlth respect to the vessel.

t. ln subnnrine vessel, the combination of a plurality of pairs ofscrews mounted upon the exterior of the vessel, an elec tromagnetcarried upon each pair of screws, a pinion attached to each screw, aworm gear meshing with the' pinions of each pair of screws, and meansfor driving each of said worm gears to rotate the screws of each pair inunison and thereby move the electromagnet mounted thereon with respectto the vessel.

5. In a submarine vessel, the combination of two pairs of horizontalscrews rotatably mounted upon the exterior oi the vessel, two pairs O'fvertical screws rotatably mounted upon the exterior of the vessel, aplurality of magnets, one carried upon each of the pairs of screws,means for driving both pairs of horizontal screws in unison to causehorizontal. movement of the magnets carried on said screws with respectto the vessel, and means for driving both pairs or' vertical screws in'unison to cause vertical movement of the magnets carried on saidvertical screws with respect to the vessel.

6. ln a submarine vessel` the combination of two pairs oi. l'iorizontalscrews, rotatably mounted upon the exterior of the vessel, two pairs overtical screws rotatably mounted upon the exterior of the ves sel, aplurality ot magnets, one carried upon each of the pairs oi.l screws, amotor, counections for driving both pairs ot' horizontal screws inunison to cause horizontal mover ment ot the magnets carried thereonwith respect to the vessel, connections iior driving both pairs otvertical screws in unison to `cause vertical movenient ot' the magnetscarried on said vertical screws with respect to the vessel, and means:for selectively connecting to said motor the driving connee tions forsaid horizontal and vertical pairs of screws.

7. In a submarine vessel, the combination or a plurality of pairs ofhorizontal screws rotatably mounted upon the exterior oi' the vessel, aplurality of pairs of vertical screws rotatably mounted upon theexterior of the vessel, a plurality of magnets each carried upon eachpair oli screws, means ttor driving the pairs oli horizontal screws inunison, means for driving the pairs oi' vertical screws in unison, means'for imlepeiulently controlling the driving means 'for said horizontalscrews and the driving moans vfor said vvertical screws, circuitconnections for simultaneously energizing the magnets carried upon thehorizontal screws, circuit connections for simultaneously energizing themagnets carried upon the vertical. screws, and means for independentlycontrolling said circuit connections'whereby the magnets carried by said1norizontal and vertical screws may be selectively energized.

S. ln a submarine vessel, the combination of a plurality of pairs ofscrews rotatably mounted on the exterior of the vessel, a carriagemounted on each pair of' screws, a sup-- port attached to each carriage,a magnet slidably mounted on each support and a spring associated witheach support for moving the magnet outward thereon.

9. In a submarine vessel the combination of screws rotatably i'nountedon the exterior of the vessel, electromagnets carried upon the screwsand adapted when energized to be held against a submerged surface andmeans for rotating said screwsrto produce move-v ment of the vessel withrespect to the submerged surface when said electro-l'nagnets areV heldagainst thek surface.

' 10. In a submarine vessel, the combination of a sleeve slidablymounted in the wall of the vessel, a shaft rotatably mounted in thesleeve, a motor for rotating the shaft, a member attached to the innerend ofthe sleeve,

*ond motor'and impartin-g to said screws a vrelatively rapid rotation tocause a quick movement of the sleeve and shaft with respect to the wallof the vessel.

` ll. In a submarine vessel the combination of a shaft extending throughthe wall of the vessel, means for imparting longitudinal movement totheI shaft without rotation thereof, a pair of electro-magnets mountedon the outer end of the shaft for holding a hook in position to beinserted in holes in a submerged surface by forward movement of theshaft, means associated with the shaft for rotating the same whilepermitting relative movement between the shaft and such means forchanging the angular relation of the pair of magnets to the vessel, alatch associated with the shaft rotating means, and means cooperatingwith the latch for retaining it and the shaft rotating means in anydesired position of adjustment.

12. A hook for use in connection with a submarine vessel comprisingShanks provided wit-h slots in their sides and enlarged heads, latchesmounted in the slots of said shanks, springs for forcing said latchesoutwardly and a link provided with apertures within which the Shanks arefitted with the latches normally held within the slots by the walls ofthe apertures.

In testimony whereof I affix my signature June 2Q, 1918.

VILLIAM DAVID SISSON.

Witness:

DOROTHY M. LANG.

Copies of `this patent niay be obtained for five cents each, vbyaddressing the Commissioner of Patents,

v Washington, D. C.

